Tubular-radiator construction



S. VOLKl TUBuLAR RADATOR coNSTRUCTIONl APPLICATION FILED MAY 26, l9l9.

,atentedSe )t. 27, 1921.

ioined to tho middlo ta ered oftion 3, aS desoflbed, vvh1ofl po Initsthe rear end of the tube, vvhon lt lS puHed forWord endWise, to slideout through the opening left by the front eIld of the tube, regardleSSof in which (1ireotioI1 tlle tubeS are nShed out. The so1deI' vvhioh iSfun iIlto the SpaceS betveen the heads of the tubeS may entirely filltheSe S ceS, of may be restrioted to the outer poftions of theSo Spooes,So thot only tho extfeooe ollter edge PortionS of the tubeS ofe Soldefedtogefhor, thereby Inking it oasieI to nlelt t11e soldeI vvhen it isdeSifed to feInove any of the tubeS. 1he HoIne of a tofch, foI exaInPle,dirootod againSt tho outer edgeS of the thin loyefS of SoldeI, or evendireotly into the lI1ol1th of the tnbe itself, vvi11 obviously beSuificient oo Inelt the SoldeI round the )artiolllar t11bo vvhich it isdeSifed to feodef feInovable by the me1t ing of the solder. The tuboSoon be mdo of Sheet II1et81 of aI1} suitoble chofootef, S11oh os thtordinorily en1Ployod foI thiS purpose. 1 fefofobly vvhen Inade of oo er,the tubeS are firSt givon o both in n1elted Solder, to givo then1oooting. In ossoIIlbling the tubeS, they are then bonnd togethef iI1 thedeSifed relotion, sonlevvhot tightly of one side of the 1adiotoI' thanot the ot11er, so thot the onds vvill not bo ex8otly tight togetheI' atthe othef Sido. The face of the fodiotor is then presSed downWardly intoo tub of IIlelted Solder, So that the lattef vvi11 oreeP in betvveen thoendS of the tubes vvhioh are not held so tightl togother, thus not onlyInelting the prevlouSly forIned solder ooating on tlle Square heods ofonds of the tubes, but also fi1]ing ony go S of Smon S aoes Whioh moyexist betWoen the ot sideS of the Squafe hedS of the tubes. ThiS oon1-lete1 binds the tubes together ond SoolS the SpaceS betveon either thoffont of tho foor side of the fodiatof, and then the ooIdS oI' vvireS01' 0ther binding 8re ren10ve(1 t0 1 low the endS of the tubes at thoother sido to s fing vory S1ightly o oft, ond this Sido of the fadiotofiS then fofced dovvnvvardly into o bod of Inelted Solder, ond the tubesot this sido of tlle fadiatof vvi11 be Soldered togethef in the IIlonnefrevionsly de- Scribed. ThofefteI', of co11I'se, S pre viously Stted, asuitoble caSing iS plooed oronnd the radiator, So that the vvator Wi11be oonfined in the S aCes betWoen the tubes- Thus,vvith thisconstrnotion, the ame of o toroh When directed into the open end of atnbe vvill not on1 7 nlelt the soldeI' around thiS end of the tube, SoaS to looSen the squore hed of the tllbe, but Win olSo Inelt tho solderoround the other end of the soIne tube, inosInuch oS the Honle and heotvi11 )oss entirely through the tube, thllS 1ooSenin both endS of thetobe at the SoIne tinle. Then, by using Poir of pliers of other too1,the 10osened tobe oon bo Pl111ed poftion of the tuboby ol1tva 1'd, ondthe reinforoe in the end of tho tnbe i11 tend to )revent the tool froInin jurin the sheet IIletol of the tubo, or froII1 diStorting the end ofthe tube, vvhioh iS one of the obiects of the feinfofoe I)1e viouSlydeScribed. In forn1ing the tubes, it is found that tho contraotion oftho Iniddlo ortion of the tube, by forn1ing the longitudinaloorfugations, So thot the tubo beooInes of leSS dianleter, SeTveS toforIn the tapered ortions 3, as it iS hefe that the oorrugotionsterIninate or diSappear, eaoh Cofrugation preferably hoving o taperedend, b11t these endS terII1inate shoftl of the f1t SI1rfadoeS 11iohfofIn t11e SideS of the Square heads of each tnbe.

Thus eooh tube is externolly SII1ooth and free ffoII1 edges oI'roieotions vhioh 111ight interfere vvith the inSertion and fen1oval ofthe t11bes, and eooh tube iS infern11y reinfofoed at eoch end thefeof,So that the tvvo heodS of the TadiotofS, each hood boing 11ojde 11p ofthe Squaro ends of the tubeS, afe vory Strong and rigid ond ado ted toWithstand the ex anSion and oontraotion due to ohongeS in teInpeftufe,aS vvell as other StfainS, nd

vvhefeby each tube iS individuolly Ten1ovoblo endvviSe, in the InannorSpeoified.

.By providing the interno1 reinforoenentS the fectangulaf headS of thetubeS afo ren dered nonooIn reSSible, so thot the oon1pfeS- sibleIIletol portion 1 of eooh t11bo tero1inotos of each end in ononooInpressible head. In other vvords, the int11rned ortionS pfe ventthe ooII1 )reSSion of tho tube, vvhich II1ight ooour in oase offreoZing, froIn extend ing into the heods, as tho inneI' edge of eooh)ortion is in osition to fevent the oo11- proSsion from extonding fromthe topored portion 3 iofo the rectangulor heod, Whefe by soohooInpreSSion vvi11 not tend to distoft tho feotongulor hedS in o Woythot Inight 1ooS,n the conneotionS betvveen the headS, 01' in vv8y thfn1ight tend to pro doce trouble of diHfoulty in the reInovo1 ondSubsoquent feinSertion of any of tho tubes. l

vVhat 1 olaiIn os II1 invention iS Sheet metal tubes forn1ed vvithrednced Inidd1eportionS to provide Spaces betWeen then1 foI' theoiro11lotion of tho vvoteI' nd hoving reotongular heods vvhich orooxternoHy Sn1ooth and inteTnoHy reiI1forced ond vvhioh afe held togetherby Solder Whioh Seals the SPaceS to prevent leakage of the vvater and tofender eooh tube feII1ovb1e endvviSe fvithout diStorbing the otherSodioent thefeto.

2. A fodiotor Strlloture aS Speoified in oloin1 1, Soid reduoed Iniddlepoftion of eooh tube being oonnooted by Shoft )ortionS foderingtherefron1 to the feotangulof heodS,

3. A radiotof strnoture adS SPooifiled in o1aiIn 1, each tube being tfnod ot opP0- site endS thereof to forIn the Said reinforce inSide ofech head.

A radiator structuTe as specied in claiIn 1, the Iniddlo ortion of oachtube being coTrugated longitudinally inSide to re duce the diameter andTender the tube C0In )reSSible betvveen Said non-coIn reSSibleinternally reinforced headS in caSe the nter freezeS vvithin theradiator, having tapered oftionS betvveen said headS and the Iniddleortion, and sIid corrugations extending into Said ta ered )oI'tionS andSto ing Sho t of the einfofce in sid headS.

5. A- Tditor Structure as Specied in clniII1 1, the SideS of eachrectngu1r hond being a11 diS oSed ontside of the externol dianleter ofSoid Iniddle portion.

6. A radiatoI' tube having a rednced middle orti0n 1, S uare heads 2 thesideS of vhich 1I'e onSide of the external diaIneter of said lniddle)Ortion, ta )ered portionS 3 to I1nite the n1iddle ortion vith Sidheads, and in-tufned )ortionS fofII1ing o liI1ing for the ehtireinterior of Soid square headS,

providing a compressible n]iddle oI tion 25 betvveen non-conlpressibleheads.

SIDNEY vOLK.

